CVE-2026-77912: Improper Neutralization of Input During Web Page Generation

A stored cross-site scripting XSS vulnerability was identified in GitHub Enterprise Server that allowed an authenticated attacker to inject arbitrary HTML attributes into rendered Markdown because the Markdown rendering pipeline rewrote quote characters in already-sanitized HTML without...

CVE-2026-75101: Authorization Bypass Through User-Controlled Key

An authorization bypass vulnerability was identified in GitHub Enterprise Server that allowed any authenticated user of the instance to read the raw diff or patch of pull requests in private repositories without authorization. Access tokens for raw pull request diffs and patches were scoped to th...

PT-2026-97051

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions 3.17 through 3.17.20 GitHub Enterprise Server versions 3.18 through 3.18.14 GitHub Enterprise Server versions 3.19 through 3.19.11 GitHub Enterprise Server versions 3.20 through 3.20.7 GitHub Enterprise Server...

CVE-2026-77987: Server-Side Request Forgery (SSRF)

A server-side request forgery SSRF vulnerability was identified in the notebook viewer of GitHub Enterprise Server. The notebook viewer validated the scheme and host of a user-supplied URL but did not validate the port, allowing requests to be directed to internal services listening on other port...

EUVD-2026-69716

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...

EUVD-2026-69714

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster...

EUVD-2026-69715

A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all...

CVE-2026-76851

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...

CVE-2026-19118

A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all...

CVE-2026-18730

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster...

CVE-2026-76851

A Server-Side Request Forgery (SSRF) vulnerability in GitHub Enterprise Server allowed remote code execution on the instance. The root cause was insufficient network isolation that permitted malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests ...

CVE-2026-76851 Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed remote code execution via network access from pre-receive hooks to internal services

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...

CVE-2026-76851 Server-Side Request Forgery vulnerability in GitHub Enterprise Server allowed remote code execution via network access from pre-receive hooks to internal services

A Server-Side Request Forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed remote code execution on the instance. Insufficient network isolation allowed malicious pre-receive hook code to impersonate an internal service and redirect trusted internal requests to a...

CVE-2026-19118 Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution

A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all...

CVE-2026-19118 Race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution

A time-of-check time-of-use race condition vulnerability was identified in GitHub Enterprise Server that allowed remote code execution. Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests. This vulnerability affected all...

CVE-2026-19118

A time-of-check time-of-use (TOCTOU) race condition in GitHub Enterprise Server enabled remote code execution . Exploitation required an authenticated user with write access to a repository and precise timing of concurrent upload requests . All versions prior to 3.22 were affected; fixes are avai...

CVE-2026-18730

This is a server-side request forgery (SSRF) vulnerability in GitHub Enterprise Server affecting the Manage API . An unauthenticated endpoint parsed an attacker-supplied cluster configuration and issued gateway-to-agent requests whose HMAC authenticated only a timestamp , not the request path or ...

CVE-2026-18730 Server-side request forgery vulnerability in GitHub Enterprise Server Manage API leaked a replayable gateway-agent bearer token

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster...

CVE-2026-18730 Server-side request forgery vulnerability in GitHub Enterprise Server Manage API leaked a replayable gateway-agent bearer token

A server-side request forgery SSRF vulnerability was identified in GitHub Enterprise Server that allowed an unauthenticated attacker to cause the Manage API to send crafted outbound requests to an attacker-controlled host. An unauthenticated endpoint parsed an attacker-supplied cluster...

PT-2026-84531

Name of the Vulnerable Software and Affected Versions GitHub Enterprise Server versions prior to 3.22 Description A time-of-check time-of-use TOCTOU race condition—a scenario where a system checks the state of a resource before using it, but the state changes between the check and the use—allows...